--- zzzz-none-000/linux-4.4.60/fs/notify/inotify/inotify_user.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-1750e-727/linux-4.4.60/fs/notify/inotify/inotify_user.c	2021-02-04 17:41:59.000000000 +0000
@@ -97,7 +97,7 @@
 	mask = (FS_IN_IGNORED | FS_EVENT_ON_CHILD | FS_UNMOUNT);
 
 	/* mask off the flags used to open the fd */
-	mask |= (arg & (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK));
+	mask |= (arg & (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK | IN_RECURSIVE));
 
 	return mask;
 }
@@ -813,8 +813,13 @@
 	BUILD_BUG_ON(IN_EXCL_UNLINK != FS_EXCL_UNLINK);
 	BUILD_BUG_ON(IN_ISDIR != FS_ISDIR);
 	BUILD_BUG_ON(IN_ONESHOT != FS_IN_ONESHOT);
+	BUILD_BUG_ON(IN_RECURSIVE != FS_EVENT_ON_CHILD_RECURSIVLY);
 
+#if defined(CONFIG_FSNOTIFY_RECURSIVE)
+	BUG_ON(hweight32(ALL_INOTIFY_BITS) != 22);
+#else
 	BUG_ON(hweight32(ALL_INOTIFY_BITS) != 21);
+#endif
 
 	inotify_inode_mark_cachep = KMEM_CACHE(inotify_inode_mark, SLAB_PANIC);